Telephone receiver



Jan. 19, 1932. Q H, FRANKS 1,841,469

TELEPHONE RECEIVER Y Filed Jan. 29, 1929 5/ www) Patented Jan. 19, 1932 Pari-:rrr oFFlcE l UNITEDSTATES CLEM H. FRANKS, F LA GRANGE, ILLINOIS, ASSIGNOR '.IJO WESTERN. ELECTRIC COM- PANY, INCORPORATED, OF NEW YORK, N. Y., CORPORATION 0F NEW YORK TELEPHONE RECEIVER Application led Ianuarym29, 1929. Serial No. 335,810.

This invention relates to telephone receivers and more particularly to the simplicity of construction of telephone receivers for assembly.

The object of this invention is to provide a simple, durable and efficient telephone receiver.

In accordance with the object of the invention, there are provided pole ieces of magnetic structure Which are held 1n spaced .relation byan insulating member and locked in a predetermined position by a metallic locking member common thereto. Disposed upon the pole pieces adjacent the metallic locking member are ,coils Which'are held in place by another metallic locking member disposed upon the outer ends of the pole pieces and cooperating With the irst mentioned metallic locking member for locking the parts in assembled position.

A full understanding of the invention will be had from the following description when taken in connection with the vaccompanying drawings, wherein Fig. 1 is aplan view of the receiver as assembled in the case;

Fig. 2 is an elevation of the assembly of units before their insertion into the case;

Fig. 3 discloses a metallic spacing member for providing Vthis assembly, and

Fig. 4 shows the type of form Wound coil employed.

Referring now to the drawings in which like numerals designate similar parts in the various figures, there is disclosed a usual Watch-case type of telephone receiver'case 10 (Fig. 1), for enclosing the Well'known receiver parts consisting of an arc-shaped magnet 11, binding posts 12, and pole pieces 13 which are held in contact with the magnet 11 by bolts 14 which secure lower rightangle extensions 15 of the pole pieces and the magnet 11 to the receiver case.

This invention is concerned with the means for mounting the pole pieces 13 and their accompanying coils 18 in the receiver case 10,

-and especially with assembling these parts before they arel i'nountcd in. the receiver case.

In accomplishing this assembly the poleieces 13 are ii'rst s ac ed in redetermined P P relation by means of a suitably apertured insulator 19 which is inserted over the tops of the pole pieces and moved downwardly therealong until flush with the top surface of the pole piece extensions 15. The aper.- tures 2() in the insulating member 19 are of suiicient Width to accommodate the rightangle bends 21 at the bottom of the pole pieces so that the insulating member 19 rests Hush on the extensions 15 and provides for a firm base for the coils to be installed later.

After the insulator 19 is thus installed 'there is inserted a metallic locking member 22 having T-shaped apertures 23 which are slightly smaller in cross section than the cross sections of thevpole pieces 13. The apertures 23are placed over the ends of the pole pieces and the metallic member 22 is then forced down the pole pieces to the insulating member 19. Since the locking member 22 consists of metal the tips 24 thereof adjacent the T-shaped apertures 23 are resilient and therefore irmly grip the pole pieces 13 as the locking member is moved into position. lThus it is to he understood that the insulating member 19 iorms the base for the coils and the metallic member 22 grips the polepi'eces and locks them in position. It would not be practical for the insulating member 19 to serve both of these purposes since the apertures 20 therein must be of suicient Width to accommodate the bends 21, and therefore a irmly gripping member such as the metallic member 22 must' be provided for locking the pole pieces in position.

A common insulatingv member 25 is next inserted over the pole pieces 13 and the coils 18 with connected insulators 26 are then installed. The insulators 26 are ordinary paper insulators that are attached to the ends of the coils 18 atthe time that the coils are Wound. These coils 18 consist of vWire -form Wound on a paper core 19 without heads or'ends, and

there is a great saving in the winding of these coils as well as in their simplicity of construction, because the coils may be wound in numbers rather than singularly as Where they are wound on the pole pieces 13. When the coils are wound on the pole piecesonly one extensions require individual handling,

and thus the form Wound coils 18 Which are Wound in numbers are a significant improvement over such coils. Both ends 27 and 28 of the coils are brought out at the saine end of the coil, and after the coils are inserted on the pole pieces the ends 28 are joined at 29 and the insulating Washers 26 and the common insulator 25 serve to insulate the connection 29 from .the coils and the metallic spacing member 22. Above the coils 18 on" thepole pieces 13 there is installed a common insulating member 30 and then a metallic locking member 31 Which is similarin con'- struction to the locking member 22, having T-shaped apertures which are slightly smaller than the cross sections of the pole pieces to grip them and securely hold the top ends ofl the pole pieces in position. lVith the coils and the pole pieces thus assembled the completed assembly is then ready for insertion into the receiver case 10.

From the above description it is to be understood that the metallic lookin members 22 and 31 securely and rigidly grip the pole pieces to hold them in a fixed position, and insulating member 19orms the base for the v,coils 18 and preliminarily spaces the pole pieces for the locking members. By employing metallic locking members the pole pieces 13 are held much more rigidly than they Would be if simply insulating members such as themember 19 Were installed for this purpose. It is'also to be noted again, that the form Wound coils 18 donot require spools or heads and may be Wound in multiple rather than separately as Where the coils are Wound upon the pole pieces 13. It is therefore believed to be apparent that the invention provides an economical and rigid telephone receiver assembly.

It is of course to be understood that the invention is not to be limited by the s ecic embodiment here described, but is limited only by the scope of the appended claims.

What is claimed is: Y 1. In a telephonereceiver assemblyof coils and pole pieces having right-angle extending supports, an insulating member for insertion` over the pole pieces down to the supports for spacing the pole pieces, and a pair of spaced metallic members for gripping the for receiving said pole pieces, whereby said locking member may be disposed adjacent said insulating member for locking said pole .pieces in spaced positions, form wound coils disposed upon said pole pieces adjacent said locking member, and a second locking member having apertures for receiving said pole pieces disposed upon said pole pieces adjacent said form Wound coils.

4. In a telephone receiver, pole pieces, and a locking member having cross-shaped slots therein arranged to receive said pole pieces and forming resilient aw portions upon each side of the pole pieces for holding' said pole pieces in predetermined relative positions.

5. In a telephone receiver, pole pieces, and a locking member having cross-shaped slots therein .portions of Whicli'being parallel and arranged to receive the pole pieces, said slots forming a plurality of resilient jaw portions upon each side of said pole pieces for locking said pole pieces in predetermined relative positions. 6. 'In a telephone receiver, pole pieces, form Wound coils disposed upon said pole pieces,

and a locking member having cross-shapedslotstherein arranged to receive said pole pieces and lock said pole pieces in spaced re-y lation.

7. In a telephone receiver, pole pieces, a locking member having cross-shaped slots therein disposed -upon said pole pieces for locking said .pole pieces in predetermined spaced relation, form Wound coils disposed upon said pole pieces, and another. locking member having cross-shaped slots therein disposed upon said pole pieces at a position spaced from said first named locking member for locking the pole pieces in predetermined spaced relation. i"

8. In ateleph'one receiver, pole pieces, form Wound coils disposed upon said pole pieces,

and a locking member havingcross-shaped slots therein portions of which being parallel for receiving said pole pieces, Said slots forming a plurality of resilient jawmeinbers upon each side of said pole .pieces for locking said pole pieces in predetermined spaced relation.

In Witness whereof, I hereunto subscribe my name this 18th day of January, A. D. il

CLEM Il. FRANKS. 

